Rail-bond.



` No'. 888,980. PATBNTED MAY 26, 1908. A.l H. BNGLUND.

RAIL BUND. l Arrrlrouron I ILnp JUNI: 1a. 1904.

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AXEL H.ll;`.\( ll.\'l). OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO PROTECTED RAIL BOND COMPANY. Ol? PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

RAIL-BOND.

No. 888,980. Specification of Letters Patent. Patented May 26, 1908.

Application filed June 1G, 3.904. Serial No. 212,785,

To all zLLo/n 'it' may concern Be it known that l, AXEL ll. llvGLUNn, a

citizen o1 the L'nited States, residing in the vented certain new andk uselul Improvements ,A

.'infRail-Bonds, of which the following is a specification.

This invention relates to an improvement in rail bonds, and has for its object to provide an improvement in the means 'of securing the bond to ythe rails of a railroad or other structure to-be bonded. f

I have illustrated my invention as applied to bonds of the class in which the body is provided with a loop which is adapted to permit the contraction and expansion of the rails or,parts 'of other structures to which the bonds are attached without injury t0 the bond, and also of that type in which the body of the bond is composed of a series of thin si ips arranged side by side, that is, one upon the other, in a well known manner.

It is to be understood, however, that my invention may be applied to any form of bond, and is not limited to a bond having a body of any particular or special construction.

My invention resides in the novel features of' construction hereinafter described. set orth specifically in the claims, and illusmated 1n the accompanying drawings forming a part ofthis specification, and in which Figure I isa side elevation of a rail bond embodying my inventionshown as applied underneath the bases at the joint of two abutting rails. F ig. II is a top plan view of the same. Fig.l III is a sideelevation of a different form of bond shown as applied to the sidesof the balls of two abutting railsat their joint. Fig. IV isa top or edge view of the same Fig. V is a section of the sameon theline V-V oi" Figs. III and IV.

In the drawings, l designates the abutting ends of two rails of a railroad, and 2 desi nates a islnplate by means of which the sald abutting ends of the' rails are secured together in a usual and well knownrnanner.

Although the bond is shown as applied to the rails of a railway track, it obviously may be used-for electrically bonding the parts of minals 5, for instance, they may be -formed other structures. i Referring fo Figs', I and II the body of the rail bond is shown as being composed of a number ofgroups or series 3 of lat ribbonlike strips, the strips or ribbons of each group being arranged one upon top of the other,

several groups or series ot' ribbons or strips being arranged edge to edge as is clearly mdlcated 1n FigII.

l The ribbons or strips composing each i;

group or series 3 may consist of separate dis connected lengths, or, if desired, the said,

strips may be formed by winding a single strip of considerable length in a well knownmanner, the said strips comprising or con sisting of the convolutions of the said Wound strip. It is to be understood, however, that it is immaterial whether the said strips .are formed cfa number of separate pieces or whether the said strips consist of a single integral strip of considerable length Wound to form a series of convolutions.

The bodyof the bond illustrated in Figs. III to V inclusive consists of a single group 4 of strips arranged one on top of the other, as is clearly indicated. The strips constituting the bond shown in these figures as in the construction shown in Figs. I and II, may consist of separate pieces of suitable material arranged in the manner indicated or the group or" strips may be formed by winding a single strip of considerable length so as to form a series of convolutions, the convolutions constituting the stri s, but, as stated with respect to Figs. I and I, it is immaterial whether the strips consist of se arate pieces or are formed by Winding a single stri-p as described. N

If desired, my inventionmay be applied to a bond in' which the body consists of a ,single solid piece of suitable electrical conducting material.

In each .of the figures of the drawings, 5 designates the terminals of the bonds which may be formed upon or secured to the body of the bonds by brazing', Welding, drop-forging, or in any other manner whatsoever.

I pave provided a recess or depression 7 in each of the terminals for the reception of solder or any suitable metal 8, the fusing point of which is lower than the fusing point of the metal of the terminals and body `portion' of the bond.

The recesses or depressions 7 may be formed in any suitable manner in the terby cutting out some of the metal of the-terminals, or by pressure exerted by a ydie -or other' suitable tool upon the said terminals'.

After the depressions or recesses are formed in the terminals, they are filled with some suitable metal of the character described, so that the metal i'n cach depression preferably, but not necessarily, projects a short distance above the surface of the body of the terminal, as indicated at 9 in Figs. lV and V. As a matter of fact, the fusible metal may be flush with or even below the surface of the body'by reason of the fact that upon the application of heat and pressure to the side of the terminal opposite the solder or fusible metal in the operation of attaching the bond to the rail, the fused solder or metal is forced into contact with the rail so as to make a proper joint.

It will be observed that each of the recesses or pockets for the fusible metal or solder in the bonds is entirely surrounded by a wall or rim so that when the bonds are applied to a structure to be bonded, the recesses or pockets are completely closed, s o that it is necessary in the use and practice of my invention that the said recesses or pockets to be filled with the fusible soldering material prior to the application of the bond toA the said structure. y

Prior to the application of a bond to the structure to lbe bonded, the surfaces of such structure, as, for instance, the rails of a railway track at the points at which the bonds are to be secured to the structure, are bur nished or 'iolished The bonds are then a plied so t at the surfaces of the metal he d 41n the recesses or pockets in the bonds are in contact with the polished surfaces upon the structure to be bonded, after which heat and pressure are applied to the bonds at the points where they are to be connected to the structure to be bondedby means of which the bonds are securely attached to the material of the structure being bonded. By reason of the application of ressure and heat, the material of the vbonds is rought in very close relation to the material of the bonded structure, making both a mechanical and electrical union between the bond and structure bonded, so that an electric current pass readily through the stifucture. happens that in the two forms of construction shown in Figs. I and II and in Fi s. III to V, the recesses 7 extend across vt e strips or ribbons which constitute the bond and which are arranged side by side. During the process of attaching the bond to the structure being bonded, as set forth above, the fusible metal located Withinthe recesses 7 is forced in all directions and into all interstices, however small. In consequence of this, the portions of the ribbons or strips at the points where they are connected to the material of the structure being bonded are brought into lsubstantial andV ractical con* tact with the metal of the bon ed structure, for instance, the rails of a railway track. In' this manner, both the mechanical and elec` whereby when the said bond is a trical union between the bond and the bonded structure are very satisfactorily made.

I do not desire to be limited to the details of construction illustrated and described herein for it is obvious that various changes may be made without departure from the spirit and scope of my invention.

Having thus described my invention, l. clain 1. A bond for electrically bonding structures comprising a series of ribbons orstrips arranged one upon-the other, the edges of which ribbons forni fiat surfaces, terminals at the opposite ends of the said bond, the said terminals being provided with recesses formed in the edges of and extending across the said strips, and metal fusible at a lower temperature than that at which the material of the bond is composed is fusible located in the said recesses, the said metal in the said recesses heilig ada )ted to be partiallydisplaced by the app ication of heat and pressure in the process of attaching the bond to the parts to be bonded, whereby the edges of the said ribbons or strips are brought into substantial contact with the metal of the said parts to be bonded.

A bond for electrically bonding structures, said bond having a body portion which consists of a plurality of strips arranged one on top of the other, and terminals secured at the opposite ends of the said body portions, the said terminals being provided with recesses which extend across the said strips,

and a metal fusible at a relatively low temperature located in the said recesses which recesses are provided for the purpose of preventing the esca e of the said fusible metal from between t e said terminals and the parts of a structure to be bonded when heat and pressure are applied to the terminals to secure them to the said parts. 4

3. A rail bond having a flat terminal provided in its inner face with a solder cavity extending throuehout substantially the entire length and lieight thereof and being of uniform depth laterally or in a direction perpendicular to the plane of the terminal, in

combination with a ra'l, and a illin of solder in said cavifty between the rail an the back of the terminal.

4. A bond adapted for. use for electrically bonding structures, the said bond being pro-4 vided with a recess having `a wall which eX- tends entirely around the same, so that when the bond is, ap lied to the structure to be bonded the sai recess is closed on all sides.

5. A bond adapted for use for electrically bonding structures, the said bond having terminals each of which is provided with recesses, and each of whichkrecesses has a wall or rim extending entirely around the same', plied to the parts of a structure to be bon ed, the said recesses are closed on all sides.

S'Ssleso 6. -A bond adapted for use in bonding structures; whereby an electric current niay pass through saidstructures, thesaid, bond l being provided with recesses having walls extending entirely around the said recesses, fusible soldering metal located in the said recesses, the said recesses being -`closed on all sides when the bond is applied to the structure to be bonded, whereby the said soldering metal must be' placed in the recesses prior to the placing ofthe bond against the structure to be bonded.

7. A bond for electrically bonding structures, thesaid bond having a terminal provided in its inner face with a solder cavity extending throughout substantially the entire length and heighth thereof, and being uniforin of depth laterally or in a direction perpendicular to the plane of the terminal, in

combination With'the bonded structure, and 20 'name this 13th day of June, A. D. 1904.

AXEL H. ENGLUND. 

